Printing-press bed



Ap'ril l, 1.930. w. s. wARNcK 1,752,767

PRINTING PRESS BED 'Filed Feb. 27, 192e 2 sheets-sheet 1 752272 zo /7 55 Z7 3,4

Patented Apr. 1, i930 p y SL-TTESf was WAL'Lncns. wARNocK, or CHICAGO, IrlLrrtoIs vPnrNrIiIG-rnnss BED Applicationled'February 27, 1928.` Serial No. 257,407.`

10 the-lclarnps orregisterhooks whereby such clam-psior registerfhooks mayzbe caused to travel infthengrooves to bring the yclamping jaws .thereof into orouty of engagement with.

the plates .orforms upon the` beds. g

l5 ,:JInstea'd of casting thegelongated gears :in:

tegrallylwith the bed,V as illustrated inmy copendingV application74 Serial 1 No. 257,406.5 led February :27,` r1928,1 I form `the ,c elongated Ifgears .separately :from the v bed and x 20 maintain the'mlin assembly with thefbed by means 'of key retaining bars. `Either or both the rgears andbarsare preferably o Wedging ormationmand the bed islprovided with shoulf ders, i nthe gear receiving grooves, `which Y 5,25 overhang Jthe ,elongatedfgears and constitut abntments: againstawvhi'ch the 'gearsareiord byfthea'otion` of the retaining bars whereby thezgears-are rigidlysecuredainrplace.: The@ are;4 desigrablytwof gears in: each groove` and theselgearseare spaeedapartfto aorda clear,- ancev therebetween f into: `fwl1ieh the foreign matter Vmayxlzae.disehargedfremfthe gears-and moved-'byasutabletodlwr, e i.

The-inventon-will*be moretullyexplened Yby'refmeneeatoche'laeeornpanyilg, ;dlwngs in which; Fgtigls afplaj view/of aepqrtienliof afbed togethenwth aprintiiig plate there@ held; by 'mealsrfffregster hooks l`vor; clamps;

-Fifgr2 s `aside view-ofthe parte 'Shownin Fig 'die isfa` chenal-viewonlinef tional view.;

.9 ,beiesullys iliilstrated.asiteprears @erron side-ofthe cylinder; and other spiral grooves being suggested;v andFig. 12 is a sectional view on line 12-,-12 of Fig. 11.

Thebody of therclamp illustrated is composedof mL-shaped member l and a 55 U-shaped member 2 one of whose sides .8 en-A gages the uprightside of the member l. An assembling Ibolt 4; passes through the -ends of the U-shaped member 2-and Ais threaded into the upright side ofthe L-shaped meme e@ ber 1. vAnother asseniblingvbolt or screw 5 passes through the outer end lof the top side ofthe L-shaped member l and enters the U-shapedmember 2, this bolt being threaded into said U-shapedmember. V gagingl-ja'w 6-is formed with a stem 7 which is journaled in thetop side of the clamp body 1. A cam 8 is fastened upon the lower end of the stem 7, this camconstituting a flange .whoseupper--faceds in contact with the lower 70 face ofthe topqside ofthe bod-yrmemberll, being maintained inthis nrelationby ashoulT der-Qewhioh contacts with the topifacery of said top `side. of the Ab.odyff-i'neinber @Such lower l`faeefo'f -`thisbodyfrriernber, is; raised to 75 a vdepth less than` the thickness Yof' saidcaiii and just suiicient V,to snnglyl receive'lthe'iad nstingipae which iis sliablineimdt nally of the lelarnpfrbo'dyrk This Qp'latel is damped by the hf; 'fifi the helfe-4' against the clarnpubodyr vp The springfs'eives tomain'- tain` the reduceds end 10. i `of .the. `plate Q l() in thatfarefeoanialwitliftheV j aw stem. 71 k`- It 'also has.twogdianietrically opposite concave actu.- ating portions that arelocated'betwenlthe parts 8f; When either'fof thefdivells .8.. eiig gages- 'por'tion .10',4 the; plate v10 A 90 'thrustoutwardly thefaiisfitfthe j aw' v against the force `of the springlfll andfw "en grae'adjustingpimiento niedgwthe! The work` en-` 65 es y within the groove 13 of the bed or form support .14, the plates 12 being movable transversely of the clamp body and beingprojectable laterally thereof at their longitudinal sides in order that they may serve to-hold the clamp in assembly with the bed. The upper sides of said retaining plates 12 are formed with recesses 122 which receivethe arcuate portions 8 of the cam 8. whereby said plates are prevented from being moved lengthwise of the clamp body. The slots or recesses 12 in each retaining plate 12 are slanted as illustrated whereby the adjusting plate has wedging engagement` with the retaining plates. W'hen the jaw 6 is placed lengthwise of the clamp body, the cam portions 82 are positioned so that one of them fully receives the adjusting plate portion 10, the wedging fingers 102 then causing the rev taining plates to move together to bring the outer longitudinal edges of these plates flush with the sides of the clamp body. When these retaining plates are thus drawn inwardly toward each other, the clamp body may be inserted into the selected one of the parallel grooves 13 formed in the bed support 14, this groove being of just such depth as to bring the plates 12 into the plane of the slots 15 formed in the sides of the groove 13, these slots being just of sufficient depth to snugly receive the outer longitudinal sides of these plates when the jaw 6 is turned into a plate holding position, the jaw, in being rought into its plate holding position, forcl ingthe adjusting plate 10 outwardly `untilits cam engaging portionlO is engaged `by one of the dwells 8. The plate holding jaw 6 is then held from vertical displacement and close tothe work support 14 to take part in holding the plate or work 16 close upon its su port.

he clamping device is also adjustable in the groove 13 that receives it so that its4 location `may be readily changed to suit the locationof the printing element 16. The clamping device illustrated includes a worm` screw 17 which coacts with elongated fixed gears 18 in the bottom of the corresponding groove, these gears 18 being hereinafter more fully described. The worm screw 17 is mounted upon the stemof the bolt 4 andis free to turn on and with respect to said boltY stem, said: worm screw being in thrusting relation tothe body of the clamp so that whenthe screw is turned the clamp willbe forced tol move alongthe groove in which its body is received. Said screw is turned by means of twointermeshing bevel pinions 19 and 20,'the pinion 19 being housed by the body member 2.androtatablethereinwhile the pinion 20 is directly formed uponthe bodyof the screw 417. `Thel pinion 19 is coaxial with thejaw stern7. Said jaw stein is provided with a cylindricalbore` 21 while the pinion '19 is 1 .providedwith-a square bore 22 'that is in alignment with the bore 21. A square wrench may be passed through the bore 21 into the bore 22 in order to turn the pinion 19 to turn the screw 17 and force or effect the travel of the clamp.

In the use of the clamping device, the body thereof is placed in the groove 13 that receives it in close proximity to the work that is to be held, the actual clamping engagement of the clamping jaw with the work being effected by turning the screw 17 in i themanner described.

Eachofthe two gears 18 in the bottom of each groove 13 is somewhat in the form of a rack, being constituted of a row of teeth which are in fixed relation to the bed 14 and which gears are separately formed and thereafter assembled` with the bed in accordance with my present invention. The teeth of each of the two gears 18 are helically inclined and have their crowns curved upon an axis extending along the groove, the teeth of `each of two fixed gears in a groove being spirally aligned with the teeth of the other fixed gear so that the teeth of each gear are, in effect, continuations of the teeth of the other. In

other words, the gears 18 are of arcuate cur.

vature, the gears havinga common center or axis of curvature which is coincident with the axis of the worm 17. The thread of the worm 17 is thus placed in very intimate contact with the teeth of the gears 18, the engagement of the worm thread with the teeth of the `gears 18 being full throughout the arcuate lengths of said gear teeth.

Referring. to the `form of` the invention shown clearly in Figs. 3 and 4, the teeth 18 are provided upon the inner and upper corner portions of bars 23 whose body portions are overhung by shoulders24 formed in the bed. The adjacentV sides of said bars are spaced apart to forma channel 25 in which foreign matter that descends` into the groove and `which is dislodged fromv theiixed gears in thegroove maybe received. The lower and adjacent corners of the bars 23 may be formed with `wedging faces `26 which converge upwardly." A `retaining bar 27 is inserted between the wedging faces26, this retaining bar-j desirably also having'wedging faces that engagea-nd slope respectivelysimilarly to the wedging faces 26.A Said retaining bar is forced into place and serves, when being forced into place,to force the gear bars 23 outwardly and upwardly and into tight engagement with the shoulders 24 above the gear bars and the sides of the elongatedpart ofthe corresponding groove that are alongside of the gear bars. My new vconstruction is a decided improvement overthe prior structuresas it enables the elongated gears to b e separately formed and accurately placed and permits them to be replaced when any of the gears thereon become broken.` The structure shown in Fig.` 7 .employs a retaining bar 28 which serves to spread the gear bars 23 laterally apart, the lower and outermost corners of the gear bars 23 having wedging faces 26 as do also the portionsV of the bed 14 which are opposed by said faces 26. Said wedging faces upon said gear bars 23 converge downwardly as do also-the opposed wedging faces upon the bed whereby said gear bars are forced to rise as they are spread apart by the retaining bar 28. The tops of the gear bars 23 engage the shoulders 24 that are formed in the bed and which overlie said gear bars.

In the structure of Fig. 8 there is a single gear bar 29 in which both sets of gear teeth 18 are cut. The upright sides of the gear bar 29 are of step formation to be engageable with shoulders 30 and 31 formed on opposite sides Vof fthe groove 13 which generally corresponds to the groove 13 hitherto described.

The retaining bar 32 is forced beneath the gear bar 29 to force this gear bar into engagement with the shoulders 30 and 31.

The structure of Fig. 9 is generally similar to the structure of Fig. 8 except that the single gear bar 29 'of Fig. 8 is replaced by Y the two gear bars 29 and also with the exception that the retaining bar 32 is formed with ribs 322 that are .received in grooves formed in the bottoms of the bars 29.

In the structure of Fig. 10 the single elongated gear bar 33 carries a single row of gear teeth 34 which are illustrated as beingof Y helical curvature concentric with the axis of the particular clamping worm 17 that is within the groove. The gear bar 33 is held tightly in place by the retaining bar 35. The portions of the gear bar 33 which margin its longitudinal edges and the adjacent portions of the bed 14 have interengaging hook formations 33, 14 whereby said gear bar is rigidly held in place.

Changes may be made without departing from the invention.

Having thus described my invention, I claim: Y

1. A printing bed havin a groove formed therein for receiving the odyportionof a plate engaging clamp, in combination with an elongated gear inserted within said groove, and a retaining bar inserted between the `bottom of the groove and a lower portion of said gear toposition such gear. 1

2. The structure kof claim 1 wherein the 5. A printing bed havin a groove formed f therein for receiving the ody portion of a plate engaging clamp, in combination with an elongated gear inserted within said groove, the bed also having a shoulder overhanging the gear and engaging the same to position it, and a retaining bar inserted between the bottom of the groove and a lower portionof said gear to position such gear my name.

WALLACE S. WARNOCK.

retaining bar is of wedge formation where it engages the gear to force the gear into position.

3. The structure of claim 1 wherein the elongated gear has a wedging face that is engaged by the bar whereby the gear is forced into position. v

4. The structure of claim lpwherein the faces of the bar and gear that are in engagement are both wedging to forcethe gear into place. 

